水流挟沙力计算公式比较分析

Comparison analysis for the formula of silt transport capacity

泥沙输移是流域土壤侵蚀、搬运和沉积过程中一个很重要子过程,而水流挟沙力是表征在一定条件下水流挟带泥沙能力的综合指标,也是径流分离土壤、输移泥沙的控制参数之一。本文对目前被广泛采用的坡面和沟道水流挟沙力计算公式的建立条件和理论基础进行了简要阐述,比较分析了各公式的应用可能性和局限性。

Sediment transportation is an important sub-process of soil erosion-transport-deposition process in a small watershed. Moreover,silt transport capacity is a compounded index to describe the capacity of flow to transport the sediment. Forever, it is an important parameter to separate soil by runoff and transport sediment. In this paper, the condition and the theory foundation of widely used silt transport capacity＇s formulae of overland flow and channel flow have been expatiated. And the possibility and localization of each formula has been compared and analyzed.